Hello @KamilDev,
We don’t provide a recommendation because Nakama supports both - the examples mix and match for this reason as well, so we sometimes provide examples in one or the other, although parts of the docs may favor one over the other.
For local development, I’d argue that Postgres is slightly simpler given that it’s single node by default, but either will work fine.
So I think that in the end it comes down to whether you think you’ll need to take advantage of the distributed features that CRDB offers in a production setting or not vs the increased operational complexity that may come with it.
Best.